scholarly journals Estimation of initial-state structures in high-energy heavy-ion collisions using principal component analysis

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
Shreyasi Acharya ◽  
Subhasis Chattopadhyay
Keyword(s):  
Principal Component Analysis ◽  
Heavy Ion Collisions ◽  
Principal Component ◽  
Component Analysis ◽  
Heavy Ion ◽  
High Energy ◽  
Initial State ◽  
Ion Collisions

scholarly journals Initial state and thermalization in the Color Glass Condensate framework

2015 ◽  
Vol 24 (10) ◽  
pp. 1530008 ◽  
Author(s):  
François Gelis
Keyword(s):  
Wave Function ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
High Energy ◽  
Color Glass ◽  
Color Glass Condensate ◽  
Nuclear Wave Function ◽  
Initial State ◽  
Early Stages ◽  
Ion Collisions

In this review, I present the description of the early stages of heavy ion collisions at high energy in the Color Glass Condensate framework, from the pre-collision high energy nuclear wave function to the point where hydrodynamics may start becoming applicable.

scholarly journals Principal component analysis of collective flow in relativistic heavy-ion collisions

2019 ◽  
Vol 79 (10) ◽  
Author(s):  
Ziming Liu ◽  
Wenbin Zhao ◽  
Huichao Song
Keyword(s):  
Principal Component Analysis ◽  
Mode Coupling ◽  
Principal Component ◽  
Component Analysis ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Human Beings ◽  
Hydrodynamic Simulations ◽  
Particle Distributions ◽  
Ion Collisions

Abstract In this paper, we implement principal component analysis (PCA) to study the single particle distributions generated from thousands of $$\mathtt {VISH2+1}$$VISH2+1 hydrodynamic simulations with an aim to explore if a machine could directly discover flow from the huge amount of data without explicit instructions from human-beings. We found that the obtained PCA eigenvectors are similar to but not identical with the traditional Fourier bases. Correspondingly, the PCA defined flow harmonics $$v_n^\prime $$vn′ are also similar to the traditional $$v_n$$vn for $$n=2$$n=2 and 3, but largely deviated from the Fourier ones for $$n\ge 4$$n≥4. A further study on the symmetric cumulants and the Pearson coefficients indicates that mode-coupling effects are reduced for these flow harmonics defined by PCA.

scholarly journals MEDIUM-INDUCED GLUON RADIATION AND JET QUENCHING IN HEAVY-ION COLLISIONS

2004 ◽  
Vol 19 (04) ◽  
pp. 271-285 ◽  
Author(s):  
CARLOS A. SALGADO
Keyword(s):  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
High Energy ◽  
Jet Quenching ◽  
Gluon Radiation ◽  
Initial State ◽  
New Developments ◽  
Ion Collisions ◽  
Reliable Interpretation ◽  
Comparison With Experimental Data

In this brief review, we summarize the new developments on the description of gluon radiation by energetic quarks traversing a medium as well as the observable consequences in high-energy heavy-ion collisions. Information about the initial state is essential for a reliable interpretation of the experimental results and will also be reviewed. Comparison with experimental data from RHIC and expectation for the future LHC will be given.

scholarly journals Elliptic flow of colored glass in high energy heavy ion collisions

2003 ◽  
Vol 554 (1-2) ◽  
pp. 21-27 ◽  
Author(s):  
Alex Krasnitz ◽  
Yasushi Nara ◽  
Raju Venugopalan
Keyword(s):  
Heavy Ion Collisions ◽  
Elliptic Flow ◽  
Heavy Ion ◽  
High Energy ◽  
Colored Glass ◽  
Ion Collisions

scholarly journals Primary Projectile Fragmentation Distribution in High Energy Heavy Ion Collisions

1984 ◽  
Vol 71 (6) ◽  
pp. 1429-1431 ◽  
Author(s):  
Y. Kitazoe ◽  
O. Hashimoto ◽  
H. Toki ◽  
Y. Yamamura ◽  
M. Sano
Keyword(s):  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
High Energy ◽  
Projectile Fragmentation ◽  
Ion Collisions

scholarly journals Signatures of QGP at RHIC and the LHC

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
T. Niida ◽  
Y. Miake
Keyword(s):  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
High Energy ◽  
Jet Quenching ◽  
Theoretical Studies ◽  
Debye Screening ◽  
Direct Photons ◽  
Ion Collisions ◽  
Experimental And Theoretical Studies

AbstractThe progress over the 30 years since the first high-energy heavy-ion collisions at the BNL-AGS and CERN-SPS has been truly remarkable. Rigorous experimental and theoretical studies have revealed a new state of the matter in heavy-ion collisions, the quark-gluon plasma (QGP). Many signatures supporting the formation of the QGP have been reported. Among them are jet quenching, the non-viscous flow, direct photons, and Debye screening effects. In this article, selected signatures of the QGP observed at RHIC and the LHC are reviewed.

scholarly journals Local spin polarization in high energy heavy ion collisions

2019 ◽  
Vol 1 (3) ◽  
Author(s):  
Hong-Zhong Wu ◽  
Long-Gang Pang ◽  
Xu-Guang Huang ◽  
Qun Wang
Keyword(s):  
Spin Polarization ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
High Energy ◽  
Local Spin ◽  
Ion Collisions ◽  
Local Spin Polarization
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